IAQ - UV LIGHTS

Important Safety Information

⚠️ WARNING: Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be performed by a licensed professional HVAC installer or equivalent, service agency, or the gas supplier.

⚠️ CAUTION: As with any mechanical equipment, contact with sharp sheet metal edges can result in personal injury. Take care while handling this equipment and wear gloves and protective clothing.

⚠️ WARNING UV LIGHT SOURCE: Ultraviolet (UVC) Radiation Hazard. This cover is provided with an Interlock to reduce the risk of ultraviolet radiation exposure. Any exposure will cause eye and skin damage. Do not look into UV light source. Access panels must be in place during appliance operation. Disconnect all power sources from UV Light, the Air Handling Equipment or Duct System.

General Information

Germicidal lights emit ultraviolet (UVC) energy that has been proven effective in reducing microbial life forms (viruses, bacteria, yeasts, and molds) in the air.

UVC germicidal lamps greatly reduce the growth and proliferation of mold and other bio-aerosols (bacteria and viruses) on illuminated surfaces.

Germicidal lamps are NOT intended to be used for removal of active mold growth. Existing mold growth must be appropriately removed PRIOR to installation of the germicidal lamp.

A door switch is provided which de-energizes the UVC light when the door is opened.

IMPORTANT: Cotton gloves or a cotton cloth must be used when handling the new UVC lamp.

Application

The UVC light kit is specifically designed for LG/LC/LH/LD/KG/KC/KH/KD 078-152 units. The light is equipped with shields to focus the UVC light on the coil surface where it is needed and reduce exposure to other components for improved safety and effectiveness.

Lamps operate on 110-230V single-phase power supply. A step-down transformer may be ordered separately for 460V and 575V rooftop units. Alternately, a 110V power supply may be used to directly power the UVC ballast(s).

Specifications

Specifications subject to change without notice.

NOTE: For 460V & 575V rooftop units, order separate step-down transformers (except for LGM/LCM models).

Shipping and Packing List

Package 1 of 1 contains the following:

• 1 - Germicidal light
• 1 - UVC light assembly
• 1 - UVC lamp
• 1 - UVC light shield (triangular)
• 1 - Bag assembly containing:
  • 1- Warranty sheet
  • 1- UVC Danger label
  • 82- Wire ties
  • 7- #10-16 x 5/8" sheet metal screws
  • 2- Dual quick connect adapters
  • 2- Wire harnesses
  • 2- Wiring diagrams
  • 1- Door switch
  • 1- Door bracket
  • 2- #10-16 x 5/8" Self drilling screws
  • 1- UVC field kit label

An additional, separately ordered T49 transformer is required on LGH/LCH/KG/KC/KH, 460/575V units which do NOT have a T3 transformer (unless powered directly).

NOTE - Not all components provided in kit are used in each application.

Check packaging for shipping damage. Contact the last carrier immediately if any shipping damage is found.

Before Installation

• Turn off power to the rooftop unit.
• Open access to the control box, blower compartment and the filter section.

⚠️ WARNING: Electric shock hazard. Can cause injury or death. Disconnect all remote power supplies before opening any unit access panels. Unit may have multiple power supplies. Do not operate without access panels in place.

Installation Procedures

Install UVC Light Assembly

The lamp for the UVC light assembly comes separately packaged in a foam sleeve.

1. Wear cotton gloves or use a cotton cloth when handling the new lamp. To install the lamp, remove two black plastic splash guards from the lamp holders on each end of the UVC assembly. Gently but firmly push in the splash guards on each end of the lamp. See FIGURE 1.
2. Align and insert the splash guards (now connected to the lamp) back onto the UVC assembly lamp holders. Click into place.
3. Carefully place the UVC assembly on the blower deck. Line up the mounting holes on the UVC assembly with the mounting holes on the blower deck. See FIGURE 2. Use the #10 screws provided to secure the UVC assembly in place.

FIGURE 1: Diagram showing how to install the lamp into the UVC assembly, including plastic splash guards and lamp holders.

FIGURE 2: Diagram illustrating the placement of the UVC assembly on the blower deck and securing it with screws, also showing the door switch.

Install Door Switch

Install bracket and switch on front of blower deck as shown in FIGURE 2. Wire as shown in FIGURE 3.

FIGURE 3: Wiring diagram for connecting the door switch, showing routing to the control section and connections for 24V and C wires.

Wiring Connections

1. Route the power cable wires as shown in FIGURE 4.
2. Wire tie the cable at multiple locations along the existing wire harness.
3. Make wiring connections in the control section as shown in:
   • FIGURE 5: 230V LGH/LCH/KG/KC/KH and All Voltage LGX/LCX/LHX with T1
   • FIGURE 6: 460/575V LGH/KG with T3
   • FIGURE 7: 460/575V LGH/LCH/KG/KC/KH with T49
   • FIGURE 8: LCT/LGT/LCM/LGM/LHT/LDT without T5
   • FIGURE 9: LCT/LGT/LCM/LGM/LHT/LDT with T5

FIGURE 4: Diagram showing wire routing for the UVC assembly to the control section in LC/LG/LH/LD units.

FIGURE 5: Wiring diagram for connecting the UVC cable to units with T1 transformer, detailing connections for 230V LGH/LCH/KG/KC/KH and all voltage LGX/LCX/LHX units.

FIGURE 6: Wiring diagram for connecting the UVC cable to LGH/KG 460/575V units with T3 transformer.

FIGURE 7: Wiring diagram for connecting the UVC cable to LGH/KG 460/575V units with T49 transformer.

FIGURE 8: Wiring diagram for connecting the UVC cable to LCT/LGT/LCM/LGM/LHT/LDT units without T5 transformer.

FIGURE 9: Wiring diagram for connecting the UVC cable to LCT/LGT/LCM/LGM/LHT/LDT units with T5 transformer.

Install Triangular UV Shield

To block the UVC light from reaching the filter access door, install the triangular sheet-metal panel. See FIGURE 11.

FIGURE 10: Illustration showing the general placement for installing the triangular UV shield.

With the left flange of the triangular sheet metal panel facing out (see Detail A in FIGURE 11), insert and lower the bottom of the panel through the opening in the filter access door, to the right of the coil and ahead of the refrigerant lines. Slide the panel against the coil bracket and align the holes of the panel with the pre-punched holes on the coil bracket. Use #8-18 x 1/2" screws (included) to attach the panel to the coil bracket.

NOTE: The view port in the triangular panel provides a visual verification when the UVC lamp is turned on. Do not remove the view port as it shields UVC light and protects eyes from UVC exposure.

FIGURE 11: Diagram showing the installation of the triangular UV shield, including its placement relative to the coil bracket and filter access door.

Finish Installation

Close all access doors before powering UVC lamp. Apply UVC Danger label and UVC Field Kit label to blower access door so that it is clearly visible. See FIGURE 12.

FIGURE 12: Illustration showing the placement of UVC Danger and UVC Field Kit labels on the blower motor access door.

Controller Configuration

Configure M4 For UVC Light

Use the following mobile service app menu to configure the Unit Controller:

SETUP > INSTALL > RTU INFORMATION > CONFIGURATION ID2

Set position 6 to the appropriate setting to enable the UVC:

• 2=UV Lamp Only Installed
• 3=Both UV Lamp and Ionizer Installed

M3 Unit Controller Configuration

Configure the Unit Controller to enable the UVC Lamp using the following menu:

SETUP . INSTALL

Navigate through the various setup questions until Configuration ID 2 appears. Set position six to the following to enable the UVC feature:

• 1=UV Lamp only installed
• 3=BOTH UV Lamp and Ionizer installed.

Operation

For optimal performance, continuous operation of the UVC germicidal lamp is recommended.

Maintenance

For all maintenance, contact a licensed HVAC technician.

Troubleshooting: UVC Lamp Does Not Come On

1. Check Power Wiring: Disconnect 1/4" QC (quick connects) of the UVC cable near the UVC assembly. With Power ON, use multimeter to test 110-230V at the 1/4"QC quick connects from the control panel.
2. Check Lamp: Carefully remove the UVC assembly out of the rooftop unit. Use multimeter to test for continuity across each pair of pins at each end of the lamp.
3. Check Lamp Installation: Make sure that lamp's pins snap properly into the lamp holder.

Annual Lamp Replacement

⚠️ WARNING: Personal Burn Hazard. Personal injury may result from hot lamps. During replacement, allow lamp to cool for 10 minutes before removing lamp from fixture.

The lamp should be replaced every 12 months, as UVC energy production diminishes over time.

1. Obtain the correct replacement lamp for the proper germicidal light model.
2. Disconnect power to the rooftop unit before servicing the UVC kit.
3. Open the blower access door.

Lamp Disposal

Hg-LAMP Contains Mercury. Manage in accordance with local, state and federal disposal laws. Refer to www.lamprecycle.org.

Proper Clean-up Technique in Case of Lamp Breakage

Wear protective gloves, eye wear and mask.

Sweep the broken glass and debris into a plastic bag, seal the bag, and dispose of properly. Contact your local waste management office for proper disposal.

Do not use a vacuum cleaner. Do not incinerate.

Additional Warnings & Notices

NOTICE: Potential odor emissions. Odors may be present when some materials are exposed to UV light. These materials may include Technicoated or E-Coated Coils. Other materials may include chemicals, solvents, polymers and organic materials. Some occupants may notice irritation or discomfort. If odors are present, the UV Lights should be turned off and fresh air should be introduced into the occupied space immediately. Contact your Independent Lennox Dealer.

CAUTION: Potential Risk of Degradation of Materials. Potential of degraded wire insulation may cause human injury through electrical shock. UVC light may damage plastics and rubber materials. May cause fabric discoloration. Avoid UVC light exposure to plastic drain pans, wire insulation, flex duct or other plastic/rubber components. Before installation, confirm that any corrosion resistant coating (if applied to the coil) will not be negatively impacted by the UVC light exposure.

⚠️ WARNING: Potential Mold Spore Release. Application of UVC lamps to existing mold growth can cause respiratory irritation and allergic symptoms. Do not use UVC lamps where active mold growth exists. Remove active mold growth from surfaces prior to operation of UVC lamps.

⚠️ WARNING: Potential Risk of Fire. Dust, lint and other debris may cause fire if allowed to come in contact with illuminated UVC lamp. Remove any dust, lint or other debris from lamps and surrounding duct system.